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NodeJS: Interactive shell with hot reload

I’m currently working on a project in NodeJS. It’s an REST API server for a web application. Since it supports multi-tenancy but all tenants are created manually, I needed a quick and easy way to be able to call the createTenant method whenever I need it. I could have written a command-line tool that would do it for me, but actually I needed something like rails console for Ruby on Rails apps: A shell where I can just execute code in the context of my app.